A Study to Assess the Efficacy, Safety and Tolerability of VLS-01 Buccal Film, Compared to Placebo in Patients With Treatment Resistant Depression (ELUMINA)

This Phase 2, multicenter, double-blind, randomized, placebo-controlled trial will enroll approximately 142 participants with TRD, randomized 1:1 to receive a total of 2 double-blind administrations of VLS- 01-BU (buccal film containing VLS-01) or placebo, administered via the buccal transmucosal route, with a 2-week interval between each administration, during the placebo-controlled treatment period. All participants will have their symptoms monitored for 12 weeks in the placebo- controlled follow-up period, following the second administration of VLS-01-BU or placebo. After the placebo-controlled treatment and observation period all participants will be re-randomized 1:1 to receive one double-blinded administration of VLS-01-BU (dose strength 1 or dose strength 2) during a non-placebo-controlled treatment period. Final safety and efficacy assessment will be conducted two weeks after administration of the third dose.